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      <title>5-MySQL_JDBC - 交互式测验</title>
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      </style>
    </head>
    <body>
      <div class="main-wrapper">
          <div class="quiz-container">
            <div class="quiz-header">
              <h1>5-MySQL_JDBC - 交互式测验</h1>
              <p>检验你对文档内容的理解程度</p>
            </div>
            <div id="quiz-content">
                <div class="quiz-body">
                    <div class="progress-bar">
                        <div id="progress-indicator"></div>
                    </div>
                    <div id="question-container">
                      <p id="question-text"></p>
                      <ul class="options-list" id="options-list"></ul>
                    </div>
                    <div id="result-container"></div>
                    <div id="hint-container" class="hint-container"></div>
                </div>
                <div class="quiz-footer" id="quiz-footer">
                  <button id="prev-btn" class="nav-btn">上一题</button>
                  <button id="hint-btn" class="nav-btn" style="background-color: #ffc107; color: #333; box-shadow: 0 4px 12px rgba(255,193,7,0.3);">提示</button>
                  <button id="next-btn" class="nav-btn">下一题</button>
                </div>
            </div>
          </div>
      </div>

      <script>
        const quizData = [
  {
    "question": "根据文档，“JDBC的四大金刚”指的是JDBC API中最核心的四个接口/类。下列哪一项不属于这“四大金刚”？",
    "options": [
      "Connection",
      "Statement",
      "DataSource",
      "DriverManager"
    ],
    "correctAnswerIndex": 2,
    "explanation": "文档中明确指出了JDBC的四大核心组件是：DriverManager（用于注册驱动）、Connection（表示数据库连接）、Statement（用于执行SQL语句）和ResultSet（用于存放结果集）。DataSource虽然在现代JDBC编程中常用于获取连接，但它并不是文档所指的传统“四大金刚”之一。",
    "source": "文档中「JDBC的四大金刚」部分",
    "hint": "回顾文档中明确列出的四个核心对象，它们分别负责驱动管理、数据库连接、SQL执行和结果集处理。"
  },
  {
    "question": "在遵循文档描述的标准JDBC操作流程时，以下哪个步骤顺序是完全正确的？",
    "options": [
      "创建连接 -> 加载驱动 -> 创建Statement -> 执行SQL",
      "加载驱动 -> 创建连接 -> 创建Statement -> 执行SQL",
      "加载驱动 -> 创建Statement -> 创建连接 -> 执行SQL",
      "创建连接 -> 创建Statement -> 加载驱动 -> 执行SQL"
    ],
    "correctAnswerIndex": 1,
    "explanation": "正确的JDBC操作流程是层层递进、缺一不可的。必须先通过加载驱动来让程序知道如何与特定数据库通信，然后才能基于驱动建立连接（Connection），有了连接之后才能创建Statement对象来承载SQL语句，最后才能执行SQL。",
    "source": "文档中「JDBC操作步骤」部分",
    "hint": "想一想，在与数据库对话之前，你的Java程序需要先准备好什么？第一步总是加载“翻译官”（驱动）。"
  },
  {
    "question": "文档中提到了SQL注入风险，并给出了解决方案。防止SQL注入的核心思想是什么？",
    "options": [
      "对所有用户输入进行严格的长度限制。",
      "采用预编译对象（如PreparedStatement），将用户输入作为参数处理，而不是拼接到SQL字符串中。",
      "在服务器端对用户输入的特殊字符（如 '、--）进行手动替换。",
      "为数据库访问设置复杂的密码，并定期更换。"
    ],
    "correctAnswerIndex": 1,
    "explanation": "文档中明确指出应“采用预编译对象来编程”。PreparedStatement会将SQL模板和用户输入的数据分开发送给数据库执行。数据库会先编译SQL模板，再将用户输入作为纯数据参数填入，从而杜绝了将用户输入当作SQL指令执行的可能性，这是防止SQL注入最有效的方法。",
    "source": "文档中「SQL注入问题」部分",
    "hint": "文档中展示了一张图片说明了SQL注入的风险，并紧接着给出了一句关键的编程建议。"
  },
  {
    "question": "在文档所介绍的MVC设计思想中，控制器（Controller）的核心职责是什么？",
    "options": [
      "直接执行数据库的增删改查（CRUD）操作。",
      "负责业务数据的封装和信息表示（Model）。",
      "为用户提供UI界面和数据展示（View）。",
      "接收用户请求，并调用相应的模型进行处理，扮演“总调配中心”的角色。"
    ],
    "correctAnswerIndex": 3,
    "explanation": "根据文档定义，控制器(C)是MVC模式的枢纽。它的主要职责是“接受用户请求，并调用相应的模型处理”，它不亲自处理业务逻辑或数据展示，而是像一个调度员，确保用户的请求被正确地导向相应的模型(M)进行处理，并将结果交由视图(V)展现。",
    "source": "文档中「MVC设计思想」部分",
    "hint": "在MVC三层中，哪一层像一个“交通警察”或“调度员”，负责指挥请求的流向？"
  },
  {
    "question": "当使用JDBC调用一个含有OUT输出参数的存储过程时，必须执行哪个关键步骤才能成功获取返回值？",
    "options": [
      "在执行`execute()`方法后，立即关闭Connection对象。",
      "使用`CallableStatement`的`registerOutParameter()`方法注册输出参数及其类型。",
      "将存储过程调用的SQL语句从`{call pro2(?,?)}`改为`select pro2(?,?)`。",
      "使用`executeUpdate()`方法代替`execute()`方法来执行调用。"
    ],
    "correctAnswerIndex": 1,
    "explanation": "文档中的代码示例明确展示了，在调用含有OUT参数的存储过程时，必须在执行`proc.execute()`之前，使用`proc.registerOutParameter(index, Types.XXX)`方法。这一步是向JDBC驱动声明：在指定位置的参数是一个输出参数，并告知其数据类型，这样驱动才能在执行后正确地从中检索出返回值。",
    "source": "文档中「Java中调用参数中有OUT的」部分",
    "hint": "查看文档中调用带OUT参数存储过程的代码示例，在 `proc.execute()` 之前，有一个针对输出参数的特殊方法调用。"
  },
  {
    "question": "根据文档，当使用MyBatis的XML映射文件来调用存储过程时，应在`<insert>`、`<update>`等标签中设置哪个属性来指明其执行的是一个“可调用语句”？",
    "options": [
      "statementType=\"CALLABLE\"",
      "callType=\"PROCEDURE\"",
      "useStoredProcedure=\"true\"",
      "jdbcType=\"PROCEDURE_CALL\""
    ],
    "correctAnswerIndex": 0,
    "explanation": "文档中的MyBatis XML示例 `<insert id=\"empmAdd\" statementType=\"CALLABLE\">` 清晰地表明，需要将`statementType`属性设置为`CALLABLE`。这会告知MyBatis框架，底层应使用`java.sql.CallableStatement`来执行该SQL，而不是默认的`PreparedStatement`，这是调用存储过程的标准方式。",
    "source": "文档中「MyBatis调用储存过程」部分",
    "hint": "在MyBatis的XML配置示例中，`<insert>` 标签除了 `id` 之外，还有一个关键属性被设置为一个特定的大写单词。"
  },
  {
    "question": "对比文档中JDBC调用存储过程和调用函数的代码，两者在`prepareCall()`方法的SQL语法上有何核心区别？",
    "options": [
      "调用函数时必须使用`executeQuery()`，而存储过程使用`execute()`。",
      "调用函数的SQL通常以`{?=call ...}`开头，用于接收函数的返回值。",
      "调用存储过程时参数用`?`占位，调用函数时必须用命名参数。",
      "调用函数不需要`CallableStatement`，可以直接用`Statement`完成。"
    ],
    "correctAnswerIndex": 1,
    "explanation": "文档的示例展示了这一关键区别。调用存储过程的语法是`{call a_procedure(?, ?)}`，而调用函数的语法是`{?=call a_function(?, ?)}`。开头的`{?=...}`是JDBC的转义语法，专门用于表示这是一个函数调用，并且`?=`部分用来注册和接收函数的单一返回值。",
    "source": "文档中「JDBC调用函数」和「JDBC调用储存过程」部分",
    "hint": "仔细观察两个章节中`conn.prepareCall(...)`方法传入的字符串参数，函数调用的字符串开头多了一点东西。"
  }
];
        console.log("Quiz Data:", JSON.parse(JSON.stringify(quizData))); // 添加这行用于调试，以可展开的JSON格式输出
        
        let currentQuestionIndex = 0;
        let score = 0;
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        const progressIndicatorEl = document.getElementById('progress-indicator');
        const prevBtn = document.getElementById('prev-btn');
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        const hintBtn = document.getElementById('hint-btn');
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          optionsListEl.innerHTML = '';
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            const isCorrect = optionIndex === currentQuestion.correctAnswerIndex;

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            nextBtn.disabled = false; // 最后一题时，下一题按钮不禁用，而是用于显示报告
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            const resultBox = document.createElement('div');
            resultBox.className = `result-box ${isCorrect ? 'correct' : 'incorrect'}`;
            
            let html = `<h3>${isCorrect ? '回答正确！' : '回答错误'}</h3>`;
            if (!isCorrect) {
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                // 高亮正确答案
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                    child.style.borderColor = '#c3e6cb';
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                // 如果选错了，高亮错误选项
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            document.getElementById('quiz-footer').style.display = 'none';

            const correctCount = score;
            const totalQuestions = quizData.length;
            const answeredCount = userAnswers.filter(a => a !== null).length;
            const wrongCount = answeredCount - correctCount;
            const skippedCount = totalQuestions - answeredCount;
            const accuracy = totalQuestions > 0 ? Math.round((correctCount / totalQuestions) * 100) : 0;
            const errorRate = totalQuestions > 0 ? Math.round((wrongCount / totalQuestions) * 100) : 0;

            const finalScoreHtml =
                '<div class="final-score-container">' +
                '<h2>答题报告</h2>' +
                '<div class="score-summary">' +
                '<div class="score-card">' +
                '<h3>得分</h3>' +
                '<p>' + correctCount + ' / ' + totalQuestions + '</p>' +
                '</div>' +
                '<div class="score-card">' +
                '<h3>正确率</h3>' +
                '<p>' + accuracy + '%</p>' +
                '</div>' +
                '<div class="score-card">' +
                '<h3>错误率</h3>' +
                '<p>' + errorRate + '%</p>' +
                '</div>' +
                '<div class="score-card score-details">' +
                '<table>' +
                '<tr><td>正确</td><td>' + correctCount + '</td></tr>' +
                '<tr><td>错误</td><td>' + wrongCount + '</td></tr>' +
                '<tr><td>未答</td><td>' + skippedCount + '</td></tr>' +
                '</table>' +
                '</div>' +
                '</div>' +
                '<div class="report-actions">' +
                '<button id="review-btn">回顾测验</button>' +
                '<button class="primary" onclick="location.reload()">再试一次</button>' +
                '</div>' +
                '</div>';

            let reportEl = document.querySelector('.final-score-container');
            if (reportEl) {
                reportEl.remove();
            }
            quizContentEl.insertAdjacentHTML('beforeend', finalScoreHtml);
            document.getElementById('review-btn').addEventListener('click', reviewQuiz);
        }

        function reviewQuiz() {
            const reportEl = document.querySelector('.final-score-container');
            if (reportEl) {
                reportEl.remove();
            }

            document.querySelector('.quiz-body').style.display = 'block';
            document.getElementById('quiz-footer').style.display = 'flex';
            
            currentQuestionIndex = 0;
            loadQuestion();
            updateNavigationButtons(); // Ensure nav buttons are correctly displayed
        }

        // Event Delegation for options
        optionsListEl.addEventListener('click', (event) => {
            if (event.target && event.target.matches('li.option-item')) {
                // Check if the question has already been answered
                if (userAnswers[currentQuestionIndex] === null) {
                    const selectedIndex = parseInt(event.target.dataset.index, 10);
                    selectOption(selectedIndex);
                }
            }
        });

        prevBtn.addEventListener('click', goToPreviousQuestion);
        nextBtn.addEventListener('click', goToNextQuestion);
        hintBtn.addEventListener('click', showHint);
        
        // 初始加载
        loadQuestion();
      </script>
    </body>
    </html>
  